[Erv Plecter] likes to recreate movie props that actually work. This time around he’s making the motion detector device from the original Alien movie. You’ll immediately remember this prop after seeing and hearing it in the video after the break. For our money, the most brilliant part of that movie was the use of rhythmic sounds to boost the intensity of the tension in the viewer. [Erv's] build captures that feeling, with the steady beat of sonar and the rising pitch of a ping as an object moves towards you. The device can easily track your own movement, as it contains both a GPS module and an electronic compass. He mentions that there is a motion sensor as well, but is a bit vague about how that part of the build works. Still, it’s a nice little piece which looks great despite not being quite finished yet.

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[creatrope] sent in this slick Alien costume that he made for his son. The costume does look decent, but not professional. For something tossed together from parts around the house, it looks fantastic. The real kicker, is the fact that it has the retractable inner mouth. The retractable mechanism is constructed from Legos and extends when his son opens the mouth. We think he did a fantastic job with this costume, but if you’re looking for something a little more polished, check out this Alien made by [Asy0uw1sh ] you can see a little more detail on how it works here.